Cantilever structure sensor fault rapid excitation device and method

Abstract

This application provides a rapid fault triggering device and method for a cantilever structure sensor, belonging to the field of sensor technology. It includes a base plate, a mounting base, a mounting plate, and a collision clamp. The mounting base and mounting plate are vertically connected to the upper surface of the base plate. The mounting plate moves axially along the sensor under test. The collision clamp is mounted on the mounting plate. The sensor under test passes sequentially through the mounting base, the mounting plate, and the collision clamp. The collision clamp has a through hole for the sensor to pass through, the diameter of which is larger than the outer diameter of the sensor. The method includes mounting the sensor under test on the mounting base, mounting the collision clamp on the mounting plate, adjusting the position of the collision clamp and the gap between the through hole and the sensor; conducting vibration tests using the HB5830 test method and vibration spectrum; and swinging the collision test fixture under vibration using the cantilever structure to amplify the test magnitude through the collision effect, thereby achieving rapid fault triggering. This application significantly improves R&D efficiency and reduces time costs and experimental resource waste.

Description

Technical Field

[0001] This application relates to the field of sensor technology, and in particular to a device and method for rapidly triggering faults in a cantilever structure sensor. Background Technology

[0002] In aerospace and other fields, long cantilever sensors are typically used for measurement scenarios with poor accessibility or harsh environmental conditions. These sensors extend the sensing portion to the measurement location through their long cantilever structure. However, this structure is prone to abnormal signal output or sensor structural failure when subjected to external mechanical stresses such as vibration and impact, which can affect the successful completion of the detection task.

[0003] The structural strength of such sensors is typically assessed using mechanical testing methods such as vibration, shock, and acceleration tests. However, due to limitations in testing equipment and methods, these tests are often difficult to effectively stimulate or require a considerable amount of time to expose the sensor's weaknesses. Summary of the Invention

[0004] In view of this, embodiments of this application provide a device and method for rapidly triggering faults in cantilever structure sensors, which at least partially solves the problem of difficulty in rapidly and effectively triggering faults in cantilever structure sensors in the prior art.

[0005] In a first aspect, embodiments of this application provide a rapid fault excitation device for a cantilever structure sensor, including a base plate, a mounting base, a mounting plate, and a collision clamping block. The mounting base is vertically connected to one side of the upper surface of the base plate, and the mounting plate is vertically connected to the base plate. The mounting plate can move along the axial direction of the sensor under test. The collision clamping block is installed on the side of the mounting plate away from the mounting base. The sensor under test passes through the mounting base, the mounting plate, and the collision clamping block in sequence. The collision clamping block is provided with a through hole for the sensor to pass through, and the diameter of the through hole is larger than the outer diameter of the sensor.

[0006] According to a specific implementation of an embodiment of this application, the through hole includes two flat-topped conical holes arranged along the axial direction of the sensor, with the flat tops of the two flat-topped conical holes arranged opposite to each other.

[0007] According to one specific implementation of the present application, a gap is provided between the flat top ends of the two flat-topped conical holes.

[0008] According to one specific implementation of the embodiments of this application, the diameter of the flat top of the flat conical hole is 0.5mm to 5mm larger than the outer diameter of the sensor.

[0009] According to a specific implementation of this application, the four corners of the impact clamp are provided with mounting holes, and the impact clamp is mounted on the mounting plate through the mounting holes.

[0010] According to one specific implementation of an embodiment of this application, the mounting hole is configured as a waist-shaped hole.

[0011] According to one specific implementation of an embodiment of this application, a plurality of impact clamps are installed on the mounting plate.

[0012] According to one specific implementation of the embodiments of this application, the impact clamping block is made of mold steel Cr12MoV or similar high-hardness metal material and is subjected to quenching treatment.

[0013] Secondly, embodiments of this application also provide an activation method for a rapid activation device for cantilever structure sensor faults as described in any embodiment of the first aspect, the method comprising:

[0014] Install the sensor under test on the mounting base, install the impact clamp on the mounting plate, and adjust the position of the impact clamp and the gap between the through hole of the impact clamp and the sensor. Vibration tests were conducted using the HB5830 test method and vibration spectrum. By using a swing-impact test fixture of a cantilever structure under vibration environment, the impact effect was utilized to amplify the test magnitude and achieve rapid fault induction.

[0015] Beneficial effects: The rapid fault excitation device and method for cantilever structure sensors in this application, through modification of the test fixture, incorporates clamping blocks that can collide with the sensor cantilever. By adjusting the position of the clamping blocks and the gap between them and the sensor, the test magnitude can be significantly amplified, overcoming the original performance limitations of the test equipment and enabling stress application beyond the equipment's capabilities. It can also rapidly excite weak points in the sensor, significantly improving R&D efficiency and reducing time costs and waste of test resources. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a partial structural diagram of a cantilever structure sensor fault rapid excitation device according to an embodiment of the present invention; Figure 2 This is an overall structural diagram of a cantilever structure sensor fault rapid excitation device according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of a collision clamping block according to an embodiment of the present invention; Figure 4 This is an assembly diagram of the impact clamp and sensor according to an embodiment of the present invention; Figure 5 This is a front view of a collision clamping block according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a multi-sensor test for a rapid fault excitation device for a cantilever structure sensor according to an embodiment of the present invention.

[0018] In the diagram: 1. Mounting plate; 2. Impact clamping block; 3. Base plate; 4. Mounting base; 5. Sensor. Detailed Implementation

[0019] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0020] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0022] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0023] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0024] Firstly, referring to Figure 1 and Figure 2 This application provides a rapid fault excitation device for a cantilever structure sensor 5, including a base plate 3, a mounting base 4, a mounting plate 1, and a collision clamping block 2. The mounting base 4 is vertically connected to one side of the upper surface of the base plate 3, and the mounting plate 1 is vertically connected to the base plate 3. The mounting plate 1 can move along the axial direction of the sensor 5 under test. The collision clamping block 2 is installed on the side of the mounting plate 1 away from the mounting base 4. The sensor 5 under test passes through the mounting base 4, the mounting plate 1, and the collision clamping block 2 in sequence. The collision clamping block 2 is provided with a through hole for the sensor 5 to pass through, and the diameter of the through hole is larger than the outer diameter of the sensor 5.

[0025] In practice, the base plate 3 is fixed on the test bench, and the sensor 5 is fixed to the mounting base 4 via a flange structure or threaded structure. By adjusting the test fixture and test stress, a device is provided that can quickly induce a fault in the cantilever structure sensor 5. The application scenarios are as follows: a) Quickly exposing the weaknesses of sensor 5 in the early stages of sensor 5 development helps to improve the quality and reliability of sensor 5 products; b) For faults reported during service, check sensor 5 whose performance cannot be reproduced, quickly trigger the fault and locate the fault point.

[0026] This embodiment, based on vibration testing, departs from the traditional notion that test fixtures should be tightly secured to the test specimen, creatively employing a non-fully fixed installation method. A clamping block is installed on the test fixture that can collide with the cantilever of sensor 5. By allowing the cantilever structure to swing and collide with the test fixture under vibration, and by adjusting the position of the clamping block and the gap between the clamping block and sensor 5, the test magnitude is amplified, thereby achieving the effect of rapidly inducing a fault. Furthermore, temperature and other stresses can be applied simultaneously to further enhance the test effect.

[0027] Furthermore, refer to Figure 3 and Figure 4 The through-hole includes two flat-topped conical holes arranged along the axial direction of the sensor 5, with the flat tops of the two conical holes facing each other. The sensor 5 maintains a small gap with the inner wall of the impact clamping block 2. The sensor 5 swings cantilevered under vibration, and impacts the conical structure of the impact clamping block 2 to achieve a stress amplification effect.

[0028] In this embodiment, by setting a flat-topped conical hole, the force acting on the sensor 5 at the flat top is greater, which can concentrate the stress on a specific area of ​​the sensor 5, enhance the impact effect, and at the same time avoid cutting the sensor 5, effectively protecting the surface structure of the sensor 5. The flat tops of the two flat-topped conical holes are set opposite each other, forming a structure similar to "pinching". When the sensor 5 swings in a vibration environment, it can impact the sensor 5 from two axial directions, making the stress on the sensor 5 more uniform and comprehensive, avoiding the problem of uneven stress distribution that may be caused by impact in one direction, thereby more effectively stimulating the potential failure of the sensor 5 in different directions.

[0029] Furthermore, a gap is provided between the flat tops of the two flat-topped conical holes. This gap provides a buffer space for the swinging of the sensor 5 during vibration, preventing continuous rigid compression caused by excessive contact between the impact clamp 2 and the sensor 5. This ensures the impact effect while preventing unexpected serious damage to the sensor 5 due to excessive force in the early stages of the test, ensuring stable testing and accurate fault induction. Simultaneously, the size of the gap can be adjusted according to the size of the sensor 5 and the test requirements to accommodate different models and specifications of cantilever structure sensors 5, enhancing the versatility and flexibility of the device.

[0030] Furthermore, the diameter of the flat-top conical hole is 0.5mm to 5mm larger than the outer diameter of the sensor 5. Within this size range, the force acting on the sensor 5 at the flat-top is greater.

[0031] Furthermore, the four corners of the impact clamp 2 are provided with mounting holes, through which the impact clamp 2 is mounted on the mounting plate 1.

[0032] Furthermore, refer to Figure 5 The mounting hole is set as an oblong hole. The function of the oblong hole is to help adjust the gap between the clamp and the sensor 5. As shown in the figure, the long axis of the oblong hole is vertical, and the position of the impact clamp 2 can be adjusted up and down, thereby adjusting the gap between the through hole wall of the impact clamp 2 and the sensor 5.

[0033] Furthermore, multiple impact clamps 2 are installed on the mounting plate 1. For example... Figure 6 As shown, two impact clamps 2 are arranged in parallel, which can test two sensors 5 at the same time, improving the test efficiency. Alternatively, multiple impact clamps 2 can be set for different cantilever positions of the same sensor 5 to impact and excite the sensor 5 from multiple parts, more comprehensively exposing the weak points of the sensor 5 and avoiding the omission of potential faults due to the limitations of a single impact point.

[0034] Furthermore, the impact clamping block 2 is made of mold steel Cr12MoV or similar high-hardness metal material, and is subjected to quenching treatment to improve its hardness.

[0035] Secondly, embodiments of this application also provide an activation method for a rapid fault activation device for a cantilever structure sensor 5 as described in any embodiment of the first aspect, the method comprising: Install the sensor 5 to be tested on the mounting base 4, install the impact clamp 2 on the mounting plate 1, and adjust the position of the impact clamp 2 and the gap between the through hole of the impact clamp 2 and the sensor 5. Vibration tests were conducted using the HB5830 test method and vibration spectrum. By using a swing-impact test fixture of a cantilever structure under vibration environment, the impact effect was utilized to amplify the test magnitude and achieve rapid fault induction.

[0036] In practice, the conical impact structure should be set at the actual impact point between the casing and sensor 5 to simulate the actual installation situation; vibration test parameters can refer to GJB150, HB5830 or measured vibration spectrum, etc.

[0037] In this embodiment, two identical sensors 5 are selected to induce faults through vibration tests. a) Vibration tests were conducted using the HB5830 test method and vibration spectrum. The measured vibration magnitude was approximately 20g, and sensor 5 was triggered to fail after approximately 30 hours. b) Vibration tests were conducted using the HB5830 test method and vibration spectrum. The test fixture was adjusted according to the method of this application, and the flame-spraying condition was added. The measured vibration level was about 100g, and the sensor 5 was triggered to malfunction after 1.5h.

[0038] Actual verification showed that the stress amplification of the test equipment was approximately 5 times, and the fault excitation time was reduced by 95% compared to traditional vibration tests.

[0039] The embodiments provided by this invention, through modification of the test fixture, include a clamping block on the fixture that can collide with the cantilever of sensor 5. By adjusting the position of the clamping block and the gap between the clamping block and sensor 5, the test magnitude can be significantly amplified, breaking through the original performance limitations of the test equipment and achieving stress application beyond the capabilities of the test equipment itself. It can also quickly stimulate weak points in sensor 5, significantly improving R&D efficiency and reducing time costs and waste of test resources.

[0040] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rapid fault excitation device for a cantilever structure sensor, characterized in that, The device includes a base plate (3), a mounting base (4), a mounting plate (1), and a collision clamp (2). The mounting base (4) is vertically connected to one side of the upper surface of the base plate (3). The mounting plate (1) is vertically connected to the base plate (3). The mounting plate (1) can move along the axial direction of the sensor (5) being measured. The collision clamp (2) is installed on the side of the mounting plate (1) away from the mounting base (4). The sensor (5) being measured passes through the mounting base (4), the mounting plate (1), and the collision clamp (2) in sequence. The collision clamp (2) has a through hole for the sensor (5) to pass through. The diameter of the through hole is larger than the outer diameter of the sensor (5).

2. The rapid fault excitation device for cantilever structure sensors according to claim 1, characterized in that, The through hole includes two flat-topped conical holes arranged along the axial direction of the sensor (5), with the flat tops of the two flat-topped conical holes arranged opposite each other.

3. The rapid fault excitation device for cantilever structure sensors according to claim 2, characterized in that, A gap is provided between the flat tops of the two flat-topped conical holes.

4. The rapid fault excitation device for cantilever structure sensors according to claim 2, characterized in that, The diameter of the flat top of the conical hole is 0.5mm~5mm larger than the outer diameter of the sensor (5).

5. The rapid fault excitation device for cantilever structure sensors according to claim 1, characterized in that, The four corners of the impact clamp (2) are provided with mounting holes, and the impact clamp (2) is installed on the mounting plate (1) through the mounting holes.

6. The rapid fault excitation device for cantilever structure sensors according to claim 5, characterized in that, The mounting hole is set as a waist-shaped hole.

7. The rapid fault excitation device for cantilever structure sensors according to claim 1, characterized in that, Multiple impact clamps (2) are installed on the mounting plate (1).

8. The rapid fault excitation device for cantilever structure sensors according to claim 1, characterized in that, The impact clamping block (2) is made of mold steel Cr12MoV or similar high-hardness metal material and is subjected to quenching treatment.

9. A method for activating a rapid fault-activating device for a cantilever structure sensor as described in any one of claims 1-8, characterized in that, The method includes: Install the sensor (5) to be tested on the mounting base (4), install the impact clamp (2) on the mounting plate (1), and adjust the position of the impact clamp (2) and the gap between the through hole of the impact clamp (2) and the sensor (5). Vibration tests were conducted using the HB5830 test method and vibration spectrum. By using a swing-impact test fixture of a cantilever structure under vibration environment, the impact effect was utilized to amplify the test magnitude and achieve rapid fault induction.

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